2164553609 has 2 divisors, whose sum is σ = 2164553610. Its totient is φ = 2164553608.

The previous prime is 2164553593. The next prime is 2164553639. The reversal of 2164553609 is 9063554612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1703377984 + 461175625 = 41272^2 + 21475^2 .

It is a cyclic number.

It is not a de Polignac number, because 2164553609 - 2⁴ = 2164553593 is a prime.

It is not a weakly prime, because it can be changed into another prime (2164553639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082276804 + 1082276805.

It is an arithmetic number, because the mean of its divisors is an integer number (1082276805).

Almost surely, 2^2164553609 is an apocalyptic number.

It is an amenable number.

2164553609 is a deficient number, since it is larger than the sum of its proper divisors (1).

2164553609 is an equidigital number, since it uses as much as digits as its factorization.

2164553609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 2164553609 is about 46524.7633954220. The cubic root of 2164553609 is about 1293.5685517303.

The spelling of 2164553609 in words is "two billion, one hundred sixty-four million, five hundred fifty-three thousand, six hundred nine".